238745778 has 16 divisors (see below), whose sum is σ = 477644736. Its totient is φ = 79556400.

The previous prime is 238745729. The next prime is 238745779. The reversal of 238745778 is 877547832.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 238745778.

It is not an unprimeable number, because it can be changed into a prime (238745779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28803 + ... + 36153.

It is an arithmetic number, because the mean of its divisors is an integer number (29852796).

Almost surely, 2^238745778 is an apocalyptic number.

238745778 is an abundant number, since it is smaller than the sum of its proper divisors (238898958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

238745778 is a wasteful number, since it uses less digits than its factorization.

238745778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12769.

The product of its digits is 2634240, while the sum is 51.

The square root of 238745778 is about 15451.4005190468. The cubic root of 238745778 is about 620.3620656627.

The spelling of 238745778 in words is "two hundred thirty-eight million, seven hundred forty-five thousand, seven hundred seventy-eight".